"New season, new haircut," he writes on Instagram, showing off his very short new haircut.
Earlier in the summer, Haaland said he had received advice from Ibrahimovic not to cut his hair, as the Swede believed his strength lay in his hair.
In a video on YouTube, published on Sunday, the Norwegian calls Ibrahimovic to show off his new hairstyle.
"What have you done? Have you lost a bet? Block me and delete my number," Ibrahimovic says, laughing.
Haaland and Manchester City begin the Premier League season on Sunday against Bournemouth.
